Role of pion pole in hard exlusive meson leptoproduction

16th Workshop on High Energy Spin Physics

Goloskokov, Sergey^1

Bogolinbov Laboratory of Theoretical Physics, Joint Institute for Nuclear Research, Moscow region, Dubna

141980, Russia^1

关键词: Generalized parton distributions;    Spin asymmetry;    Spin density matrix;    Spin effects;    Transversity;    Vector meson;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/678/1/012035/pdf
DOI  :  10.1088/1742-6596/678/1/012035

来源: IOP

【 摘 要 】

We consider the pion pole contribution and transversity effects determined by the HTand ETGeneralized Parton Distributions (GPDs) which are essential in hard pseudoscalar and vector meson leptoproduction. We investigate spin effects in the ω and ρ0reactions. It is shown that the pion pole contribution is very important in the w production. Such effects in the ρ0channel are much smaller. Our results on spin asymmetries and spin density matrix elements in these reactions were found to be in good agreement with HERMES data.